fix: Fix Gradle configuration

.gitignore

@@ -1,9 +1,10 @@
+ OSX
+#
+.DS_Store
+
 # Xcode
-!**/*.xcodeproj
-!**/*.pbxproj
-!**/*.xcworkspacedata
-!**/*.xcsettings
-!**/*.xcscheme
+#
+build/
 *.pbxuser
 !default.pbxuser
 *.mode1v3
@@ -19,22 +20,33 @@ DerivedData
 *.hmap
 *.ipa
 *.xcuserstate
-project.xcworkspace
+*.xcworkspace
+/ios/Pods/
 
-# Xcode, Gradle
+# Android/IntelliJ
+#
 build/
-
-# Android
 .idea
 .gradle
 local.properties
 *.iml
+android/gradle/
+android/gradlew
+android/gradlew.bat
 
-# Node
-node_modules
-*.log
-.nvm
+# node.js
+#
+node_modules/
+npm-debug.log
+yarn-error.log
 
-# OS X
-.DS_Store
-/.vscode
+# BUCK
+buck-out/
+\.buckd/
+*.keystore
+
+# Editor config
+.vscode
+
+# Tests
+coverage

android/build.gradle

@@ -1,67 +1,53 @@
-// android/build.gradle
-
 buildscript {
     // The Android Gradle plugin is only required when opening the android folder stand-alone.
     // This avoids unnecessary downloads and potential conflicts when the library is included as a
     // module dependency in an application project.
     if (project == rootProject) {
         repositories {
             google()
-            jcenter()
+            mavenCentral()
         }
+
         dependencies {
-            classpath 'com.android.tools.build:gradle:3.5.3'
+            classpath("com.android.tools.build:gradle:4.2.2")
         }
     }
 }
 
 apply plugin: 'com.android.library'
-apply plugin: 'maven'
 
-def DEFAULT_COMPILE_SDK_VERSION = 28
-def DEFAULT_BUILD_TOOLS_VERSION = "28.0.3"
-def DEFAULT_TARGET_SDK_VERSION = 28
+def safeExtGet(prop, fallback) {
+    rootProject.ext.has(prop) ? rootProject.ext.get(prop) : fallback
+}
 
 android {
-    compileSdkVersion rootProject.hasProperty('compileSdkVersion') ? rootProject.compileSdkVersion : DEFAULT_COMPILE_SDK_VERSION
-    buildToolsVersion rootProject.hasProperty('buildToolsVersion') ? rootProject.buildToolsVersion : DEFAULT_BUILD_TOOLS_VERSION
+    compileSdkVersion safeExtGet('compileSdkVersion', 28)
 
-    defaultConfig {
-        minSdkVersion 16
-        targetSdkVersion rootProject.hasProperty('targetSdkVersion') ? rootProject.targetSdkVersion : DEFAULT_TARGET_SDK_VERSION
-        versionCode 1
-        versionName "0.2.0"
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
     }
 
-    buildTypes {
-        release {
-            minifyEnabled false
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
-        }
+    defaultConfig {
+        minSdkVersion safeExtGet('minSdkVersion', 16)
+        targetSdkVersion safeExtGet('targetSdkVersion', 28)
     }
-
-    // needed for https://github.com/square/okio/issues/58
-    lintOptions {
-        warning 'InvalidPackage'
+    lintOptions{
+        abortOnError false
     }
 }
 
 repositories {
-    mavenLocal()
     maven {
         // All of React Native (JS, Obj-C sources, Android binaries) is installed from npm
         url "$rootDir/../node_modules/react-native/android"
     }
-    maven {
-        // Android JSC is installed from npm
-        url "$rootDir/../node_modules/jsc-android/dist"
-    }
     google()
-    jcenter()
+    mavenLocal()
+    mavenCentral()
 }
 
-
 dependencies {
-    implementation fileTree(dir: 'libs', include: ['*.jar'])
-    implementation 'com.facebook.react:react-native:+'
+  //noinspection GradleDynamicVersion
+  implementation 'com.facebook.react:react-native:+'
 }